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US 5,707,321 AGranted
Four bar exercise machine
OwnerJoseph Douglas Mareshinventor
Life of this patent
Estimating the term…
Abstract
An exercise machine for exercising the lower body, the upper body, or both simultaneously. The mechanism consists of a crank, a rocker, a connector link, and a stationary fourth link so arranged as to cause a portion of the connector link to travel about a closed curve resembling an ellipse, a tear drop shape, or any variation thereof. A flywheel and/or force resisting means may be added to provide inertial characteristics and drag resistance to the operator.
Claims14
An exercise apparatus, comprising:
- a frame;
- a crank (48) rotatably connected to said frame, thereby defining a first axis;
- a first link (52) rotatably connected to said crank at a point radially displaced from said first axis, thereby defining a second axis;
- a second link (54) rotatably connected to said first link at a point radially displaced from said second axis, thereby defining a third axis, and rotatably connected to said frame at a point radially displaced from said third axis, thereby defining a fourth axis;
- and
- a user foot support force receiving member (58) connected to said first link, wherein said second axis is disposed between said third axis and said force receiving member and resistance means operatively associated with said crank for providing exercise resistance.
3 more elements
Dependencies are inferred from the claim text.